Travelling with "Children"

We brought Mieke and Mollie with us when we came down for the family pictures. BIG mistake! We are going to have to figure something out for future trips. Mieke is so big that she takes up the entire back seat, which leaves Mollie on my lap in the front seat. All went well on the trip down, but coming back, Mieke got very jealous of the attention that Mollie was getting in the front seat. (They even fight over toys in the toy box at home...) Mollie would lay with her bottom in my lap and her head on Michael's arm or shoulder. Before we got to Payson, Mieke forced (I do mean forced - she is so strong!) her way into the front seat, pushing Mollie into the back seat. She ended up with her bottom in my lap and her head on Michael's arm. Nothing like 80 pounds of dog in the front seat! She was not about to be outdone by the younger, smaller dog! We had to stop the car and make her get back into the back seat. Do they have car seats for dogs??? I guess we're just going to get this divider to put in the back of the car to keep them contained in the back. I was totally exhausted by the time we got home because the "girls" fought all the way home!